Release 4.5: Application-specific logging

In previous releases of Berkeley DB, "BEGIN" lines in the XXX.src files used
to build application-specific logging support only required a log record
number. In the 4.5 release, those lines require a Berkeley DB library version
as well. For example, the entry:

BEGIN mkdir 10000

must now be:

BEGIN mkdir 44 10000

that is, the version of the Berkeley DB release where the log record was
introduced must be included. The version is the major and minor numbers
for the Berkeley DB library, with all punctuation removed. For example, Berkeley DB
version 4.2 should be 42, version 4.5 should be 45.